Powder conveying device

Abstract

The invention relates to a powder conveying device. The device is composed of a powder storage system A, a powder pressing and conveying system B, a powder flow monitoring and adjusting system C, a powder weighing system D and a powder recycling system E; the power firstly enters the powder storage system A, and then enters the powder pressing and conveying system B under the effect of gravity and negative pressure of a pressurizer; after the powder flow monitoring and adjusting system C performs flow control, the powder is discharged in a continuous manner; when a constant-flow state is established or a verification coefficient of a measurement instrument is obtained before driving, the pressurized powder discharged from the powder flow monitoring and adjusting system C enters the powderweighing system D through valve switch, and the powder weighing system D weighs and computes the verification coefficient of the powder flow measurement instrument; and then the powder is depressurized by the powder recycling system E and returns to the powder storage system to be recycled. The device has a simple structure and a large flow adjusting range, requires small investment, is continuous and stable in operation, saves energy and is environmentally-friendly. Therefore, the powder conveying device provided by the invention has strong adaptability and a remarkably wide application prospect.

Description

【Technical field】 [0001] The invention belongs to the technical field of powder conveying. More specifically, the present invention relates to a powder conveying device. 【Background technique】 [0002] The high-concentration dense phase conveying technology is a solid particle (powder) conveying technology proposed relative to the low-concentration dilute phase conveying technology. As we all know, the high-concentration dense-phase conveying technology of powder generally has the characteristics of low energy consumption, large conveying capacity, wide conveying range, small abrasion of pipelines and materials, saving carrier gas consumption and gas power source, and saving pipeline material consumption. At the same time, the high-concentration dense-phase conveying technology is also conducive to reducing the generation of static electricity in pipeline transportation and improving the safety of conveying flammable and explosive materials. For occasions with heat demand,...

AI Technical Summary

Problems solved by technology

This kind of transportation method often has a huge system and complicated process, and this technology usually adopts the method of adding a certain amount of high-pressure gas in the transportation pipeline to maintain the transmission power in the pipeline, resulting in an increase in the consumption of carrier gas, high operating requirements, and continuous operation. , poor stability

Taking the dry powder pressurized coal gasification process in energy and chemical industry as an example, the existing gasification process powder transportation technology consists of multiple units such as normal pressure, pressurization, variable pressure, feeder and weighing meter, and is equipped with a large number of pressure , temperature and material level indicating instruments, in order to ensure the continuity of conveying, the pneumatic pressurization system is generally equipped with a booster hopper and two alternately used pressurization hoppers for joint use, the process is cumbersome, there are many constraints, and the failure rate is high. big investment

The non-advanced dry pulverized coal conveying system seriously affects the control of the gasifier temperature, which in turn leads to large fluctuations in the furnace temperature, unstable content of active ingredients, poor liquid slag discharge, high trigger shutdown rate, and what is even more likely to cause accidents, casualties

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